WO2009145688A1 - Canal de liaison montante pour service de diffusion et multidiffusion multimédia point à multipoint - Google Patents

Canal de liaison montante pour service de diffusion et multidiffusion multimédia point à multipoint Download PDF

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Publication number
WO2009145688A1
WO2009145688A1 PCT/SE2008/050639 SE2008050639W WO2009145688A1 WO 2009145688 A1 WO2009145688 A1 WO 2009145688A1 SE 2008050639 W SE2008050639 W SE 2008050639W WO 2009145688 A1 WO2009145688 A1 WO 2009145688A1
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WIPO (PCT)
Prior art keywords
base station
data
channel
mbms
user terminals
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Ceased
Application number
PCT/SE2008/050639
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English (en)
Inventor
Jiuhui Du
Bin Xu
Ying Yan
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Telefonaktiebolaget LM Ericsson AB
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Telefonaktiebolaget LM Ericsson AB
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Priority to CN200880129544.0A priority Critical patent/CN102047699B/zh
Priority to PCT/SE2008/050639 priority patent/WO2009145688A1/fr
Publication of WO2009145688A1 publication Critical patent/WO2009145688A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1874—Buffer management
    • H04L1/1877—Buffer management for semi-reliable protocols, e.g. for less sensitive applications like streaming video
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L2001/0092—Error control systems characterised by the topology of the transmission link
    • H04L2001/0093—Point-to-multipoint
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services

Definitions

  • the present invention generally relates to radio communication systems, devices, software and methods and, more particularly, to mechanisms and techniques for uplink channel communication for point-to-multipoint (P-t-M) multimedia broadcast and multicast service (MBMS) in a telecommunication network.
  • P-t-M point-to-multipoint
  • MBMS multimedia broadcast and multicast service
  • 3G third generation
  • TD-SCDMA Time- Division - Synchronous Code Division Multiple Access
  • TDD time division duplex
  • WCDMA-FDD Wideband Code Division Multiple Access - Frequency Division Duplex
  • the TD-SCDMA system design is expected to employ advantages of the following technologies (1 ) smart antenna technology, i.e., antenna beam may be formed to follow each user like spatial division multiple access (SDMA), and thus to enhance link budget, and (2) TDD and code division multiple access (CDMA), allowing the system to combine time division multiple access (TDMA) and CDMA so that the number of users in each time slot may be kept small to facilitate joint detection, which may reduce multiple-access-interference (MAI) and may alleviate the problem of enhancing the system capacity.
  • TD-SCDMA is also a synchronous system among base stations and mobile stations, especially in the uplink. Consequently, it may alleviate MAI among users and may increase link budget, and thus system capacity.
  • the TD-SCDMA is capable of supporting High Speed Downlink Packet
  • HSDPA High Speed Downlink Transport Channel
  • HS-DSCH shared high speed downlink transport channel
  • DL downlink
  • MBMS multimedia broadcast and multicast service
  • WCDMA HSDPA provides a streaming type and high power bearer in order to guarantee Quality of Service (QoS) and ensure the broadcasted data arrives to the cell bearer.
  • QoS Quality of Service
  • MCS Modulation Coding Scheme
  • the same content may be transmitted to multiple users located in a specific area, the MBMS service area, in a unidirectional fashion.
  • the MBMS service area may cover multiple cells.
  • the broadcast and multicast concepts describe different, although closely related cases.
  • a point-to-multipoint radio resource may be set up in each cell being part of the MBMS broadcast area and all users subscribing to the broadcast service simultaneously receive the same transmitted signal. No tracking of user's movement in the radio access network is performed and users may receive the content without notifying the network.
  • Mobile TV is an example of a service that may be provided through MBMS broadcast.
  • multicast the user requests to join a multicast group prior to receiving any data.
  • the user movement may be tracked and the radio resources may be configured to match the numbers of users in each cell.
  • Each cell in the MBMS multicast area may be configured to point-to-point (P-t-P) or point-to- multipoint transmission.
  • P-t-P point-to-point
  • multicast allows the network to optimize the transmission type in each cell.
  • P-t-P There are two types of air-interface mechanism for MBMS services, i.e., P-t-P and P-t-M.
  • P-t-P interface a dedicated pair of channels, uplink (UL) and downlink (DL), are used to connect between each MBMS user to the base station.
  • DL downlink
  • the P-t-M interface only a DL channel is used to push/broadcast multimedia service from the base station to the MBMS receiver (or MS receiver), irrespective of how many MBMS receivers are present. Even if no MBMS receiver is present, the P-t-M interface sends multimedia service on the DL channel. Therefore, because the P-t-P interface may guarantee/handle the QoS for MBMS transmission, the P-t-M interface may not achieve the same level of service/performance as the P- t-P interface.
  • the P-t-M interface does not support beam forming because there is no angle of arrival (AoA) measurement report feedback in UL, which is one of the desired features of the TD-SCDMA.
  • AoA angle of arrival
  • the MBMS system faces many challenges when implemented in TD-SCDMA, such as network coverage balance with legacy standards such as 3GPP R4 (TD-SCDMA) and R5 (TD-SCDMA HSDPA), time slot change, power allocation and optimization, channelization code number, as well as some TD-SCDMA specific characteristics, e.g, N-carher technique.
  • TD-SCDMA 3GPP R4
  • R5 TD-SCDMA HSDPA
  • CCSA Chinese Communication Standard Association
  • UTN Union Timeslot Networking
  • MMSFN Single Frequency Networking
  • P-t-M point-to-multipoint
  • MBMS multimedia broadcast and multicast service
  • the method includes setting up a downlink MBMS traffic channel (MTCH) from the base station to the multiple user terminals; transmitting first data from the base station via the MTCH channel in the P-t-M mode, wherein the P-t-M mode pushes data from the base station to the multiple user terminals; receiving from the multiple user terminals messages via an uplink MBMS Feedback Channel (MFCH), wherein the messages indicate whether the first data transmitted from the base station has been decoded successfully or not at the multiple user terminals; and deciding whether to transmit second data or retransmit the first data from the base station to the multiple user terminals based on the received messages.
  • MTCH downlink MBMS traffic channel
  • MFCH uplink MBMS Feedback Channel
  • a computer readable medium including computer executable instructions, wherein the instructions, when executed by a processor of the base station, cause the base station to accept an uplink channel, for a point-to-multipoint (P-t-M) multimedia broadcast and multicast service (MBMS) transmission mode, from multiple user terminals to a base station, the base station serving the multiple user terminals in a communication network.
  • P-t-M point-to-multipoint
  • MBMS multimedia broadcast and multicast service
  • the instructions include setting up a downlink MBMS traffic channel (MTCH) from the base station to the multiple user terminals; transmitting first data from the base station via the MTCH channel in the P-t-M mode, wherein the P-t-M mode pushes data from the base station to the multiple user terminals; receiving from the multiple user terminals messages via an uplink MBMS Feedback Channel (MFCH), wherein the messages indicate whether the first data transmitted from the base station has been decoded successfully or not at the multiple user terminals; and deciding whether to transmit second data or retransmitting the first data from the base station to the multiple user terminals based on the received messages.
  • MTCH downlink MBMS traffic channel
  • MFCH uplink MBMS Feedback Channel
  • a base station configured to accept an uplink channel, for a point-to-multipoint (P-t-M) multimedia broadcast and multicast service (MBMS) transmission mode, from multiple user terminals to a base station, the base station serving the multiple user terminals in a communication network.
  • P-t-M point-to-multipoint
  • MBMS multimedia broadcast and multicast service
  • the base station includes a processor configured to set up a downlink MBMS traffic channel (MTCH) from the base station to the multiple user terminals; a transceiver connected to the processor and configured to transmit first data via the MTCH channel in the P-t-M mode, wherein the P-t-M mode pushes data from the base station to the multiple user terminals, to receive from the multiple user terminals messages via a MBMS Feedback Channel (MFCH), wherein the messages indicate whether the transmitted data from the base station has been decoded successfully or not at the multiple user terminals; and the processor being further configured to instruct the transceiver to transmit second data or retransmit the first data to the multiple user terminals based on the received messages.
  • MTCH downlink MBMS traffic channel
  • MFCH MBMS Feedback Channel
  • MBMS multimedia broadcast and multicast service
  • the method includes receiving at the user terminal data on a downlink MBMS traffic channel (MTCH) from the base station, in the P-t-M mode, wherein the P-t-M mode pushes the data from the base station to the multiple user terminals; determining at the user terminal whether the data has been decoded successfully or not; and sending a message from the user terminal to the base station via an uplink MBMS Feedback Channel (MFCH), wherein the message indicates whether the data transmitted from the base station has been decoded successfully or not.
  • MTCH downlink MBMS traffic channel
  • MFCH uplink MBMS Feedback Channel
  • a computer readable medium including computer executable instructions, wherein the instructions, when executed by a processor of a user terminal of multiple user terminals, cause the user terminal to establish an uplink channel from the user terminal to a base station, for a multimedia broadcast and multicast service (MBMS) transmission mode, the base station serving the multiple user terminals in a communication network.
  • MBMS multimedia broadcast and multicast service
  • the instructions include receiving at the user terminal data on a downlink MBMS traffic channel (MTCH) from the base station, in the P-t-M mode, wherein the P-t-M mode pushes the data from the base station to the multiple user terminals; determining at the user terminal whether the data has been decoded successfully or not; and sending a message from the user terminal to the base station via an uplink MBMS Feedback Channel (MFCH), wherein the message indicates whether the data transmitted from the base station has been decoded successfully or not.
  • MTCH downlink MBMS traffic channel
  • MFCH uplink MBMS Feedback Channel
  • a user terminal among multiple user terminals, configured to establish an uplink channel from the user terminal to a base station, for a multimedia broadcast and multicast service (MBMS) transmission mode, the base station serving the multiple user terminals in a communication network.
  • MBMS multimedia broadcast and multicast service
  • the user terminal includes a transceiver configured to receive data on a downlink MBMS traffic channel (MTCH) from the base station, in the P-t-M mode, wherein the P-t-M mode pushes the data from the base station to the multiple user terminals; a processor connected to the transceiver and configured to detect whether the data has been decoded successfully or not; and the processor being further configured to instruct the transceiver to send a message to the base station via an uplink MBMS Feedback Channel (MFCH), wherein the message indicates whether the data transmitted from the base station has been decoded successfully or not at the user terminal.
  • MTCH downlink MBMS traffic channel
  • Figure 1 is a schematic diagram of a telecommunication network
  • Figure 2 is a schematic diagram of a base station and/or a user terminal according to an exemplary embodiment
  • Figure 3 is a schematic diagram illustrating various channels used in the MBMS system
  • Figure 4 is a schematic diagram illustrating a novel uplink channel in the MBMS system according to an exemplary embodiment
  • Figure 5 is a schematic diagram illustrating signals exchanged between various components of the communication system according to an exemplary embodiment
  • Figure 6 is a flow diagram illustrating steps performed by the communication system during an MBMS session according to an exemplary embodiment
  • Figure 7 is a flow diagram illustrating steps performed by a base station during the MBMS session according to an exemplary embodiment
  • Figure 8 is a flow diagram illustrating steps performed by a user terminal during the MBMS session according to an exemplary embodiment.
  • base station may include a radio base station (RBS), Node B, an eNode B or other nodes.
  • terminal device may include a mobile phone, a personal digital assistant, a camera, etc.
  • a general telecommunication system 10 may include a user terminal (UE) 12 connected to a NodeB 14 via a communication link 16.
  • the NodeB 14 may be connected to a Radio Network Controller (RNC) 18 via an interface 20, for example, an S1 interface.
  • RNC Radio Network Controller
  • RAN 22 may form a Radio Access Network (RAN) 22.
  • RAN 22 is connected to a communication network (CN) 24, that might include a serving GPRS support node (SGSN) 26, a Mobile Management Entity (MME) 28, and a Public Switched Telecommunication Network (PSTN) 29.
  • CN communication network
  • SGSN serving GPRS support node
  • MME Mobile Management Entity
  • PSTN Public Switched Telecommunication Network
  • the user terminal 12 and/or the Node B 14 may have the structure shown in Figure 2.
  • Figure 2 shows that the terminal device 12 and/or the Node B 14 may include a processor 30 that is connected to a memory 32 via a bus 34.
  • the processor 30 may be configured to process information related to sending or receiving a package or establishing an uplink channel.
  • the memory 32 may be configured to store various data used by the processor 30 or information to be transmitted by the device or information necessary for the functioning of the device.
  • the terminal or base station may include an input/output unit 36 that is configured to receive commands, for example from a user, and to send commands.
  • a transceiver 38 may be connected to bus 34 and configured to receive or send the package information.
  • the transceiver 38 may include an array antenna.
  • a scheduler unit 39 may be connected to bus 34 to perform scheduling functions. These functions may be also performed by the processor 30.
  • MBMS Traffic CHannel MBMS Traffic CHannel
  • MCCH MBMS Control CHannel
  • MICH MBMS Indicator CHannel
  • MFCH MBMS Feedback Channel
  • This channel may be used by the P-t-M interface in MBMS in both FDD and TDD mode. This channel may be shared by some or all of the P-t-M MBMS users, for example in the manner of time division multiply in uplink.
  • the MFCH channel is an uplink channel that may be used by the terminals to provide feedback to the base station that is not related to the MBMS system, in particular a P-t-M multicast system.
  • this channel is integrated with the other channels, an exemplary case is considered next.
  • One approach is to schedule each user with a particular time to provide feedback to the base station.
  • the schedule command may be indicated on MCCH or MICH channel.
  • a second approach is to not schedule the users when to provide feedback to the base station but rather to allow the users to blindly feedback within a fixed or flexible period of time. The period of time may depend on the number of the receiving users. Several users may share the new channel to increase the radio resource utilization.
  • a third approach is to allocate one or more fixed bit/bits for feedback among the available radio resource in the MFCH (one or several codes in one uplink time slot), and then the Node B knows what feedback bits belong to each user.
  • Another approach is to feedback in the same channel (radio resource unit/s) with scrambling a UE specific identification, in multi-cast mode. Then, the NodeB knows the UE ID in each multi-cast group, and NodeB uses a UE specific ID match filter to split the information from each user based on the received overlapped signals in one channel.
  • the content in MFCH may include an indication of whether the last transmission is successful or not, a parameter indicative of the current radio link quality or the Channel Quality Information (CQI), like the feedback in HSDPA, and/or may be a happy bit like the feedback in HSUPA / EUL.
  • CQI Channel Quality Information
  • the sharing manner of the UL channel among the various users may be multiplied in the time domain based on the above discussed approaches.
  • the feedback from the user terminal to the base station for indicating the QoS may be performed, for example, based on tuning the transmission block size or retransmission or up/down the transmission power, or other techniques.
  • the QoS related parameter may be the same for all of P-t-M MS users in a group, which is a unit of the P-t-M multicast.
  • the time period for the feedback may be fixed and the same for all P-t-M users, or variable and different for each P-t-M user.
  • Figure 5 shows steps taking place in a
  • FIG. 5 shows the user terminal 12, the Node B 14, the RNC 18 and the Core Network (CN) 50.
  • the CN 50 starts the MBMS session in step 52 by sending a signal to the RNC 18 with Re-Auth-Request (RAR) and Re-Auth-Answer (RAA).
  • RAR Re-Auth-Request
  • RAA Re-Auth-Answer
  • step 54 the RNC 18 sends a corresponding MBMS start signal to Node B 14.
  • the RNC 18 initiates a transport channel setup for the Node B 14 and in step 58 sends the MCCH and MICH channels to initiate the MBMS session.
  • the MBMS information is broadcasted by the logical channel MTCH in step 58.
  • the logical channel MTCH is mapped to a transport channel FACH in step 60 to Node B 14 and mapped to a physical channel SCCPCH in step 62 to the user terminal 12.
  • a new step 64 (which is shown with a dash line in Figure 5) is introduced to achieve the feedback from the user terminal 12 to Node B 14 and/or to the RNC 18.
  • the feedback is performed by using the new logical channel MFCH in step 64, which is mapped to a transport channel RACH, which is further mapped in step 68 to a physical channel PRACH, in which the detailed content may be pre-defined.
  • the content of the PRACH channel may be an ACK/NACK bit and/or a happy bit, and/or CQI like information to indicate whether the transmission was received correctly or not, whether the current propagation is acceptable or not, and/or some other predetermined transmission format.
  • the content depends on the real RAN design and application services.
  • Steps 68, 70, 72, and 74 are similar to steps 60, 62, 64, and 66 discussed above and these may occur when the steps 64 and 66 indicate that the transmission was not successful for a reason and a retransmission of the original data may be occurring.
  • a related algorithm or method may be pre-defined in NodeB to make the retransmission decision based on these messages.
  • NodeB when NodeB receives "N" feedbacks from a total of "M" P-t-M multi-cast MBMS users, where N is smaller or equal to M, NodeB may decide to retransmit the last signal. If N is small, NodeB may decide to not retransmit the signal. However, if N is large, Node B may decide to retransmit the signal.
  • the threshold for N is determined by the network operator and may depend on the number of users and other network related parameters, or may be dynamically calculated. For example, if N is smaller than M/2, no retransmission takes place. If N is larger or equal to M/2, NodeB decides to retransmit the last signal. However, in this exemplary embodiment, the QoS related parameter setting for the group of users that receive the same signal is the same for each user of the group.
  • a general purpose processor may be programmed based on the steps described with regard to Figure 6 to implement the new feedback channel described in one of the above exemplary embodiments.
  • step 600 the MBMS session is started and the transport channel is setup on Node B Application Part (NBAP), between the CN 50 and Universal Terrestrial Radio Access Network (UTRAN).
  • NBAP Node B Application Part
  • UTRAN Universal Terrestrial Radio Access Network
  • step 602 MBMS data is transmitted from Node B 14 to user terminal 12 along channels MTCH/FACH/SCCPCH.
  • the MBMS data is transmitted based on the allocation and indication specified by the MCCH and MICH channels.
  • the user terminal determines in step 604 whether the transmission from the base station is a new transmission or a retransmission. If the result of the determination is that a new transmission was received, the user terminal determines in step 606 whether the new transmission may be decoded. If the result in step 604 is that a retransmission was received, the user terminal may use in step 608 an additive procedure to merge the retransmitted information with the already received package. For example, the user terminal may use the Chase Combining (CC) or Incremental Redundancy (IR) procedures as the additive procedure. After performing step 608, the method advances to step 606.
  • CC Chase Combining
  • IR Incremental Redundancy
  • the determination in step 606 may be based on different designs, for example checking a New/Re indicator in MICH or by using an additive transmission block numbering.
  • the user terminal may generate in step 610 an ACK or NACK command based on the reception result.
  • This command as well as other information, e.g., channel status, may be feedback to the base station.
  • This information may be sent back to the base station in step 612 via the novel MFCH channel, which is mapped to a transport channel RACH, which in turns is mapped to a physical channel PRACH.
  • This combination of channels is presented as an example and it is not intended to limit the invention.
  • the base station determines whether the command is ACK or NACK. If the received command is ACK, the base station decides in step 614 that the last transmission was successfully received by all users and the base station deletes in step 616 the source data from its buffer. However, if the received command is NACK, the base station determines in step 618 that one or more user terminals did not receive the last transmission successfully. Then, the base station decides whether to retransmit the MBMS data or not. For this situation, the base station initially determines in step 618 whether a retransmission time reached a pre-defined threshold of acceptable retransmission time.
  • the base station determines in step 620 that the transmission of the MBMS data failed and the method advances to step 616. Otherwise, a retransmission is planned in step 622 and the method returns to step 602. After the transmission is determined to be successful or is determined to have been failed because of a time elapsing condition, the original MBMS data saved in the buffer of Node-B may be deleted in step 616.
  • a processor of the base station may be programmed or configured to implement a method for accepting an uplink channel, for the P-t-M MBMS transmission mode, from multiple user terminals to a base station, the base station serving the multiple user terminals in a communication network.
  • the method includes, setting up in step 700 a downlink MBMS traffic channel (MTCH) from the base station to the multiple user terminals, transmitting in step 702 first data from the base station via the MTCH channel in the P-t-M mode, where the P-t-M mode pushes data from the base station to the multiple user terminals, receiving in step 704 from the multiple user terminals messages via an uplink MBMS Feedback Channel (MFCH), wherein the messages indicate whether the first data transmitted from the base station has been decoded successfully or not at the multiple user terminals, and deciding in step 706 whether to transmit second data or retransmit the first data from the base station to the multiple user terminals based on the received messages.
  • MTCH downlink MBMS traffic channel
  • MFCH uplink MBMS Feedback Channel
  • a processor of the user terminal may be programmed or configured to implement a method for providing an uplink channel from a user terminal among multiple user terminals to a base station, for a multimedia broadcast and multicast service (MBMS) transmission mode, the base station serving the multiple user terminals in a communication network.
  • MBMS multimedia broadcast and multicast service
  • the method includes receiving in step 800 at the user terminal data on a downlink MBMS traffic channel (MTCH) from the base station, in the P-t-M mode, where the P-t-M mode pushes the data from the base station to the multiple user terminals; determining in step 802, at the user terminal, whether the data has been decoded successfully or not; and sending in step 804 a message from the user terminal to the base station via an uplink MBMS Feedback Channel (MFCH), wherein the message indicates whether the data transmitted from the base station has been decoded successfully or not.
  • MTCH downlink MBMS traffic channel
  • MFCH uplink MBMS Feedback Channel
  • the FDD and TDD MBMS systems with advanced antennas transmit based on the 3GPP technical specification release 4 (R4) and release 5 (R5) services based on multiple input multiple output (MIMO) or beam- forming techniques, in which a gain is achieved due to the introduction of advanced antennas, but they transmit MBMS data in the broadcast manner.
  • R4 and release 5 (R5) multiple input multiple output
  • MIMO multiple input multiple output
  • beam-forming techniques in which a gain is achieved due to the introduction of advanced antennas, but they transmit MBMS data in the broadcast manner.
  • this channel may provide further information, which is needed by the advanced antennas to achieve the beam- forming, and thus, the advanced antennas may also work for MBMS services. Therefore, the unbalanced coverage issue may be reduced.
  • this new channel also may provide support for using the smart antenna solution of R4 and R5 in TD MBMS network.
  • TD-SCDMA DL beam-forming needs DoA measurement in uplink and thus, the new channel may be used to provide this information.
  • Beside beam-forming the feedback channel may also be used to support MIMO or High order Sectorization (HoS) or other advanced antenna systems.
  • HoS High order Sectorization
  • the utilization of advanced antennas may save transmission power, and also may split all P-t-M MBMS users in a cell into different small groups. Thus, for each small group, for example, in one fixed beam, the P-t-M MBMS QoS handling may be easier. [0048] Thus, according to at least one exemplary embodiment discussed above, a balance is achieved between P-t-P modes having QoS evaluation and broadcast modes with no QoS evaluation. The QoS of P-t-M MBMS users may be implemented and the new shared channel may save the limited radio resource utilization.
  • the above discussed exemplary embodiments may help to implement advanced antennas like MIMO, beam-forming, HoS in MBMS network so that the problem of unbalanced coverage between MBMS and non-MBMS network is reduced and the coverage difference may be decreased.
  • These advantages of the exemplary embodiments may result in easier network planning and optimization, for example the management of the radio resources.
  • the disclosed exemplary embodiments provide a user terminal, a system, a method and a computer program product for introducing a new channel in MBMS systems. It should be understood that this description is not intended to limit the invention. On the contrary, the exemplary embodiments are intended to cover alternatives, modifications and equivalents, which are included in the spirit and scope of the invention as defined by the appended claims. Further, in the detailed description of the exemplary embodiments, numerous specific details are set forth in order to provide a comprehensive understanding of the claimed invention. However, one skilled in the art would understand that various embodiments may be practiced without such specific details.
  • the exemplary embodiments may be embodied in a wireless communication device, a telecommunication network, as a method or in a computer program product. Accordingly, the exemplary embodiments may take the form of an entirely hardware embodiment or an embodiment combining hardware and software aspects. Further, the exemplary embodiments may take the form of a computer program product stored on a computer-readable storage medium having computer-readable instructions embodied in the medium. Any suitable computer readable medium may be utilized including hard disks, CD-ROMs, digital versatile disc (DVD), optical storage devices, or magnetic storage devices such a floppy disk or magnetic tape. Other non-limiting examples of computer readable media include flash-type memories or other known memories.
  • the present exemplary embodiments may be implemented in a user terminal, a base station, and generally in a wireless communication network or system comprising both the user terminal and the base station.
  • the exemplary embodiments may also be implemented in an application specific integrated circuit (ASIC), or a digital signal processor.
  • Suitable processors include, by way of example, a general purpose processor, a special purpose processor, a conventional processor, a digital signal processor (DSP), a plurality of microprocessors, one or more microprocessors in association with a DSP core, a controller, a microcontroller, Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) circuits, any other type of integrated circuit (IC), and/or a state machine.
  • ASIC application specific integrated circuit
  • FPGAs Field Programmable Gate Arrays
  • a processor in association with software may be used to implement a radio frequency transceiver for use in the user terminal, the base station or any host computer.
  • the user terminal may be used in conjunction with modules, implemented in hardware and/or software, such as a camera, a video camera module, a videophone, a speakerphone, a vibration device, a speaker, a microphone, a television transceiver, a hands free headset, a keyboard, a Bluetooth module, a frequency modulated (FM) radio unit, a liquid crystal display (LCD) display unit, an organic light-emitting diode (OLED) display unit, a digital music player, a media player, a video game player module, an Internet browser, and/or any wireless local area network (WLAN) module.
  • modules implemented in hardware and/or software, such as a camera, a video camera module, a videophone, a speakerphone, a vibration device, a speaker, a microphone, a television transceiver, a hands free headset, a keyboard,

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  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention porte sur une station de base, un terminal utilisateur, un support lisible par ordinateur et un procédé pour accepter un canal de liaison montante, pour un mode de transmission de service de diffusion et multidiffusion multimédia (MBMS) point à multipoint (P-t-M), de multiples terminaux utilisateurs à une station de base, la station de base desservant les multiples terminaux utilisateurs dans un réseau de communication. Le procédé comprend : l'établissement d'un canal de trafic MBMS de liaison descendante (MTCH) de la station de base aux multiples terminaux utilisateurs; la transmission de premières données à partir de la station de base par l'intermédiaire du canal MTCH dans le mode P-t-M, le mode P-t-M poussant des données de la station de base aux multiples terminaux utilisateurs; la réception, en provenance des multiples terminaux utilisateurs, de messages par l'intermédiaire d'un canal de rétroaction MBMS de liaison montante (MFCH), les messages indiquant si les premières données transmises à partir de la station de base ont été décodées avec succès ou non au niveau des multiples terminaux utilisateurs; et la décision de transmettre des secondes données ou de retransmettre les premières données de la station de base aux multiples terminaux utilisateurs sur la base des messages reçus.
PCT/SE2008/050639 2008-05-30 2008-05-30 Canal de liaison montante pour service de diffusion et multidiffusion multimédia point à multipoint Ceased WO2009145688A1 (fr)

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CN200880129544.0A CN102047699B (zh) 2008-05-30 2008-05-30 点对多点多媒体广播多播服务的上行链路信道
PCT/SE2008/050639 WO2009145688A1 (fr) 2008-05-30 2008-05-30 Canal de liaison montante pour service de diffusion et multidiffusion multimédia point à multipoint

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GB2493780A (en) * 2011-08-19 2013-02-20 Sca Ipla Holdings Inc Indicating successfully received multicast transmissions from a base station
CN112291720A (zh) * 2019-07-22 2021-01-29 三星电子株式会社 基于信道反馈的多播传输方法
US11025371B2 (en) 2015-01-30 2021-06-01 Qualcomm Incorporated UE feedback for point-to-multipoint transmissions
CN113678507A (zh) * 2019-02-28 2021-11-19 弗劳恩霍夫应用研究促进协会 在非协调网络中用信号通知多播消息
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CN106160823B (zh) * 2015-04-03 2021-02-05 索尼公司 用于无线通信的装置和方法
TWI620462B (zh) * 2015-04-10 2018-04-01 財團法人資訊工業策進會 單一基地台節點對多點網路系統及其資料傳輸方法
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WO2021134764A1 (fr) * 2020-01-02 2021-07-08 Oppo广东移动通信有限公司 Appareil et procédé d'indication d'informations, équipement terminal et dispositif de réseau
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JP7744365B2 (ja) 2020-05-20 2025-09-25 中興通訊股▲ふん▼有限公司 Ｍｂｍｓアップリンクフィードバック情報に関するアップリンクリソースを配分する方法およびデバイス
WO2022000180A1 (fr) * 2020-06-29 2022-01-06 Mediatek Singapore Pte. Ltd. Procédés et appareil de transmission en multidiffusion fiable avec rétroaction de liaison montante
CN114071717B (zh) * 2020-08-06 2025-11-18 展讯通信（上海）有限公司 Mbms业务的广播方法及装置、存储介质、基站、终端
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WO2011160442A1 (fr) * 2010-06-21 2011-12-29 中国移动通信集团公司 Procédé permettant à un côté réseau d'obtenir un état de réception de service d'un côté utilisateur, et dispositif et terminal utilisateur correspondants
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CN113678507A (zh) * 2019-02-28 2021-11-19 弗劳恩霍夫应用研究促进协会 在非协调网络中用信号通知多播消息
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CN116095615A (zh) * 2020-07-15 2023-05-09 大唐移动通信设备有限公司 一种广播组播传输方式的切换方法、终端及基站
CN115244969A (zh) * 2020-07-31 2022-10-25 上海诺基亚贝尔股份有限公司 调整多媒体广播多播服务覆盖范围的方法、装置和计算机可读介质

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